| 1. |
- Kumar Sharma, Manish, et al.
(author)
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Anticorrosive evaluation of an environmentally benign chromone-thiazole hybrid with excellent anticancer activity
- 2024
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In: Journal of Molecular Liquids. - : Elsevier B.V.. - 0167-7322 .- 1873-3166. ; 405
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Journal article (peer-reviewed)abstract
- The research article comprehensively presents salient applications of an environment friendly chromone-thiazole hybrid (CTH) as a potential anticancer molecule and as an organic inhibitor against mild steel (MS) corrosion. The SRB assay used for antiproliferative screening gives excellent IC50 (10.8 μM) against MDA-MB-231 (breast cancer) cell line. Further, CTH has excellent inhibition efficacy (∼97 % at 400 ppm) against MS corrosion in 1 M HCl. The in vitro results of anticancer and anticorrosive evaluation are in good agreement with the computational studies, which include docking, ADME, DFT, MD simulation, and toxicity prediction.
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| 2. |
- Katare, Kranti Kumar, et al.
(author)
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Challenges and solutions for antennas in Vehicle-to-Everything services
- 2022
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In: IEEE Communications Magazine. - 0163-6804. ; 60:1, s. 52-58
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Journal article (peer-reviewed)abstract
- Autonomous vehicle is being developed for widespread deployment. Its reliability and safety are critically dependent on advanced wireless technologies, e.g., vehicle-to-everything (V2X) communication. The frontend of a V2X system needs an antenna module that enables the vehicle to reliably connect to all other networks. Designing V2X antenna is challenging due to the complex in-vehicle environment, trend for hidden antenna solution, long simulation time and need for omnidirectional coverage. In this article, we survey these challenges as well as existing V2X antenna solutions. In view of the drawbacks in the existing solutions, we propose an efficient design methodology for V2X antennas to provide the desired coverage. The method utilizes a simple geometrical model of the vehicle that captures the shadowing effects of the vehicle body to obtain candidate antenna locations that offer the best coverage via multi-antenna diversity. Hence, complex full-wave simulation can be avoided. The approach is validated through comprehensive full-wave simulations and pattern measurements on two car models. The results confirm that, at 5.9GHz, line-of-sight shadowing has more dominant effect on the received power than multipath propagation due to the car body. In cases of strong diffraction and surface waves, a simple rule-of-thumb can be devised to improve the accuracy of the method.
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| 3. |
- Sharma, Manish Kumar, et al.
(author)
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Comprehensive investigations of the synergistic effect of chalcone on the anti-corrosion activity of environmentally benign triazole hybrid
- 2023
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In: Inorganic Chemistry Communications. - : Elsevier B.V.. - 1387-7003 .- 1879-0259. ; 158
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Journal article (peer-reviewed)abstract
- This research article presents a comprehensive investigation into the corrosion inhibition performance of a 1,2,3-triazole-based hybrid (TCA) with incorporated triazole, chalcone, and amide moieties. The amalgamation of these pharmacologically active moieties synergistically enhances the ability of the TCA hybrid to form protective films on metal surfaces. The study employs a combination of experimental and theoretical methods to assess the corrosion inhibition properties. Multiple sophisticated techniques like weight loss, EIS, PDP, SEM, EDX, and UV–Vis spectroscopy reveals TCA's exceptional inhibitory efficiency (∼99 % at 200 ppm) for mild steel (MS). PDP analysis suggests a mixed-type inhibition mechanism. The experimental findings are further supported by the DFT calculations by exploring the interactions between the inhibitor and mild steel (MS). The remarkable corrosion inhibition efficacy of TCA along with its eco-friendly behavior aligns the present work with the growing global emphasis on sustainability.
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| 4. |
- Vijay, Kritika, et al.
(author)
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Magneto-strain effects in 2D ferromagnetic van der Waal material CrGeTe3
- 2023
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In: Scientific Reports. - : NATURE PORTFOLIO. - 2045-2322. ; 13:1
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Journal article (peer-reviewed)abstract
- The idea of strain based manipulation of spins in magnetic two-dimensional (2D) van der Waal (vdW) materials leads to the development of new generation spintronic devices. Magneto-strain arises in these materials due to the thermal fluctuations and magnetic interactions which influences both the lattice dynamics and the electronic bands. Here, we report the mechanism of magneto-strain effects in a vdW material CrGeTe3 across the ferromagnetic (FM) transition. We find an isostructural transition in CrGeTe3 across the FM ordering with first order type lattice modulation. Larger in-plane lattice contraction than out-of-plane give rise to magnetocrystalline anisotropy. The signature of magneto-strain effects in the electronic structure are shift of the bands away from the Fermi level, band broadening and the twinned bands in the FM phase. We find that the in-plane lattice contraction increases the on-site Coulomb correlation (U-eff) between Cr atoms resulting in the band shift. Out-of plane lattice contraction enhances the d - p hybridization between Cr-Ge and Cr-Te atoms which lead to band broadening and strong spin-orbit coupling (SOC) in FM phase. The interplay between U(eff )and SOC out-of-plane gives rise to the twinned bands associated with the interlayer interactions while the in-plane interactions gives rise to the 2D spin polarized states in the FM phase.
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| 5. |
- Yousaf, Irfan Mehmood, et al.
(author)
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Model simplification and validation of virtual prototypes for vehicular antenna design
- 2020
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In: 14th European Conference on Antennas and Propagation, EuCAP 2020. - 9788831299008
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Conference paper (peer-reviewed)abstract
- Wireless connectivity is becoming an important feature in cars, which together with recent developments in car design point to the need to accurately predict the performance of real antennas in simulation, to speed up the design cycle. However, it is challenging to accurately represent structurally complex real cars in simulation. This paper proposes a car model simplification approach for designing vehicular antennas, exemplified using three progressively simplified models of a hatchback car. For validation, a monopole and a PIFA operating at 800 MHz and 2.4 GHz, respectively, were mounted and simulated at two locations on these prototypes. The proposed scheme reduced the computational time to less than a third, while maintaining similar simulated antenna performance. Specifically, the antenna patterns of the simplest prototype and original one are correlated by 84% and 59% at 800 MHz and 2.4 GHz, respectively. Therefore, the proposed scheme is promising for real application.
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